package JLB_Chapter_06;
// code_06_01
public class Book {
    public static void main(String[] args) {
        Book book = new Book();
        int x = 40;
        int y = 60;
        System.out.println(book.add(x,y));
    }
    public Book getBook() {
        return this;
    }
    private int add(int x, int y) {
        x = x + y;
        return x;
    }
}
